In Ch. 3 at the assembly there is this exchange between Darcy and Bingley:

"Come, Darcy," said he, "I must have you dance. I hate to see you standing about by yourself in this stupid manner. You had much better dance."

"I certainly shall not. You know how I detest it, unless I am particularly acquainted with my partner. At such an assembly as this it would be insupportable. Your sisters are engaged, and there is not another woman in the room whom it would not be a punishment to me to stand up with."

"I would not be so fastidious as you are," cried Bingley, "for a kingdom! Upon my honour, I never met with so many pleasant girls in my life as I have this evening; and there are several of them you see uncommonly pretty."

In Act I, scene iv of Romeo & Juliet, there is this exchange between Mercutio & Romeo:

MERCUTIO
Nay, gentle Romeo, we must have you dance.

ROMEO
Not I, believe me. You have dancing shoes
With nimble soles. I have a soul of lead
So stakes me to the ground I cannot move.

Beyond the 'must have you dance' line by the hero's best friend, I see similarities in the two exchanges. The best friend would like to see his friend, the hero, in a better humour, and thinks if he can find a pretty girl to dance with, it might help. The hero is in no mood to dance, does not intend to dance, is not in a mood to be humoured, and certainly does not expect to find anyone to love or admire at the dance they are attending.